Given what happened in all slave-based societies, and the obvious fact that these robots need general intelligence, why would this end differently than any of the slave-based societies before ?
(First slave rules are capable, considerate people who make sure slaves have a reasonable standard of living. Over time, their offsprint grows more and more decadent ("intellectual" is probably the term they would use). After a while, they grow so stupid, then the inept rulers abuse slaves, or force them to work inefficiently, causing disasters, next revolt kills the masters, and generally anyone standing nearby or remotely associated with them, or in neighbouring countries, former slaves self-organise into a new state)